Mixing machine



Feb v10, 1931- w. F. DEHUFF Y MIXING MACHINE Filed Dec. 11, 192s 2 sheets-sheet 1 "FE'J' l@ Feb; 10, 1931 vw F, DEHUFF 1,792,363

MIXING MACHINE Filed Dec. 11, 1928 2 Sheets-Sheet 2 @my Mgg;

Patented Feb. 10, 1931 Y UNITED; -sra'res PATENT ortica WALTER F. DEHUFF, F GLEN ROCK, PENNSYLVANIA, ASSIGNOR TO GLEN IIXER COMPANY, or GLnNnoox, rnNNsYLvANiA MIXING MACHINEY Application led December 11, 1928. 'Serial No. 325,195.

Theinvention forming the subject matter of this application is a power ,operated mixer designed particularly for mixing or beating dough in large batches.

VIn machines ofrthis type, disclosed broadly in my United States Patent No. 1,656,665, the

doughis beaten or mixed in large bowls ofcause the cylindrical socket at the head of the beater had to Vbe exactly alined with the beater shaft. This operation became more difficult in case any dough remained in the bowl to oder resistance to the movements of the beater in the bowl in order to secure exact alinement between the socket in the head of the beater and the cylindrical beater shaft.

The object of the present invention is to providecooperating means on the head of the beater and the connecting end of the beater shaft, whereby the beater can be very quickly connected to or `detached from the beater shaft without the necessity ofiirst securing alinement between the socket in the beater head andthe beater shaft.

A further object of the invention is to provide machines of this type'with a quick acting detachable connection between thefhead of .the beater and the Yendl of the beatershaft,

whereby the beater'can be very quickly secured to or removed from the beater shaft without the necessity of yusing tools of any kind to effect this connection or removal.

s Other objects of the invention willvbe disfclosed as the detailed description thereof proceeds. A

VIn the drawings: Y 1 Figure l is a fragmentary vertical section ofthe invention; c c Y beater 4.

Figure 2 is an exploded perspectiveofthe parts ofthe invention which provide forthe attachment of the beater to the beater shaft.; Figure 3, is a perspective view of adetail ofthe joint between the beater shaft; v i w Figure 4 is a perspective view of a locking ring forming part of the joint Vbetween the beater head andbeater shaft;

Figure 5 is a vertical cross sectional view, toan enlarged scale, ofthe joint between the beater head and beater shaft, withl the locking ring of the oint in inoperative position. Figure 6 is a horizontal section.V taken lo n Figure 7 is a vertical transversesection taken on the linev 7-7 of Figure 5,"with the locking ring in its position toflockfthe beater head to the beatershaft; n, Figure 8 is a vertical section taken on the line 8 8 of Figure 9 and showing thebeater headlocked to the beater shaft; and

Figure 9 is a horizontal section'taken on the line 9-9 of Figure 8.

Referring to the drawings:

The invention forms part of a mixer comprisinga Standard l vextending upwardly from a base 2, which-,forms asupport for a mixing bowl 3, adapted to be supported by, or secured injany suitable manner to, V.the base 2 in proper position for receiving the `The beater 4 has the head 5 thereof provided with cylindrical axially; alined bores 6 and 7, the bore 6 being of larger diameter than the bore 7 'and adapted yto slide snugly on the beaterfshaftlO.

The walls of bores 6 and 7 "i are connected to each other Vby the frusto-conical wall 8, `which provides for easy sliding movement of lower end 9 -of1`the'shaft 10V from the bore 6 in the bore 7. The end 9v of shaftlO'flts snugly into ythe bore 7; and the shaft v10V fits snugly into the bore 6. part l1 of the shaft l0 is tapered sufcientlyito clear the inclined conical wall 8, so thatfthe beater headinaybe' firmly secured to shaft 1Q by contact withtwo relatively spacedparts of the shaft. l ,l I

The shaft 10 is rotatably mounted; in a Cil casing 12 which, in turn, is rotatably mounted by means of ball bearing 13 on an annular bracket 14 suitably secured to a bearing 15 depending from theV upper end of the standard 1. A drive. shaft 16 is rotatably mounted inthe bearing 15 and is rotated by means of the beveled gearing 16-17, connecting the shaft 16 to the shaft 18 of a prime mover.v .1. 4

The lower end of the shaft 16 has a pinion 19 xed thereto and in mesh withthe teeth 20 of an internal gear 21 which is keyed on or otherwise suitably secured to the shaft. The shaft 10 has a pinion 22 fixed to its upperend and meshing with the internal gear teeth 23 of'agear ring 24 fixed to the bearing 15 and forming part ofthe bracket 14 whichsupportsthe ball bearing 13. f

The gearing construction just described is adapted not only to rotate the shaft'lO about its own axis, but also to rotate'the'Y casing 12 and-the shaft 10 along with it around the axis of the shaft 16C This causes theV beater 4 to rotate in the bowl about the'axis ofthe shaft 10 and also to rotate around the inside of the bowl around-the axis of the shaft`16. This construction is fully disclosed in my United States Patent 1,656,665, and is illustrate'd here particularly to disclose the quick detachable means for'c'onn'ecting thebeater 'to the beater shaft. Y

VIn order to connectthe beater head detac'hably' tothe-lower end of the shaft 10 where it projects below 4the bottom of the casing 12,a -sleeve`25 is keyed `on to the shaft 10 and is provided with a shoulder 26 to forni a seat for part of thel ball bearing 27 which mou-nt'sthe shaft 10 rotatably inthe bottom of casing 12. Y

The sleeve 25 is secured against rotation on the shaft'l() by means 'ofthe key 28 mounted in slots 2'9 and 30 formed in the shaft' 10 and in thes'leeve'25 respectively.V The sleeve25 is prevented from lengthwise movementv on the shaft 10 by means-of a ring 31" fixed on v-theshaft 10 againstthe lower end of the sleeve 25 by a pin 32 which extends diametrically` through the ring and the shaft 10.

Y,A series 'of arms 33, 34, 35 and 36 depend from the upper part of the sleeve 25 and termina'teat their lower ends in inwardly projecting lugs 37, 38, 39 and 40, respectively, (see Figure 3). The arms 33', 34, 35 and 3 6 are Vequi-distantly spaced apart from each other 'to provide spaces 41, 42,` 43 and 44 adapted' to receive slidably lugs 45 andl 46,

formed on diametrically opposite sides of the head 5 of beater`4. `Lugs 45 and 46 are spaced ,from the end 47 of the beater head 5 at suchdistan'ce that when the end 47 contacts with the' ring 31,'the lower`sid`es'48and 49 of the lugs 45 and 46, respectively, are just clear of the upper Vsides of the inwardly projecting lugs formed onthe arms 33,v 34, and 36.

It is obvious that, when the beater'head 5 is positioned on the shaft 10 as shown in Figure 5, the head maybe rotated in either direction to cause the lugs and 46 to rest on the diametrically opposite lugs 33 and 35, or lugs 34 and 36. When the head is so rotated, the locking ring may be lowered from the position shown in Figures 5 and 6 to head-locking position shown in Figures me and 9.

They headrlocking function of the ring 50 is effected by means of the lugs 51, 52, 53 and 54,'which project inwardly from ring 50 and slide inthe spaces41, 42, 43 and 44, between the arms 33, 34, 35 and 36, respectively. l/Vhen' the ring 5 isjlowered to locking position,fthe adjacent sides of" diametrically opposite pairs of lugs 51,152, 53 and 54 engage the sides of lugs 45 and 46'and therebypreventr'otationl of the beater head relatively to the beater shaft, v v

In orderto positiony the locking ring 50 properly in locking position, the lowerpends of the arms 33, 34, 35 and 36, are. provided with coplanar arcuate grooves, in which a split ring 55 is detachably seated. The ring 55 may. be removed whenever it becomes necessary or desirable to` remove the locking ring 50.

Vclosurethat whenever'l it becomes necessary or desirable` to attach the beater to the beater shaft, all that is necessary is to raise the locking ring 50 into the position shown in Figure 5, slide the beater head on to the beater shaft until the end 47 contacts with the stop ring 31, and then give the head slight turn to seat the lugs'45 and 46 in diametrically opposite pairs of the inwardly projecting lugs 37, 38, 39 and 40. When the lugs 45and 46 are so seated the ,locking ring 50 may be dropped on to the split wire ring 55 to'lock the head securely -against rotation on the shaft 10.

By'reversing the steps of attaching the head 5 to shaft 10, as just described, it is obvious that the beater may be readily disconnected Vfrom shaft 10. It will also be obvious that the connection or disconnection of the head 5 with the shaft 10 can be effected'ma'nually and without lthe aid of any tools.

Vhat I claim is:

1."In a mixingniachine, ashaft'having a It will be obvious from the preceding dis- 'ilo I position with the lugs carried by said sleeve, means on said sleevefor filling the spaces formedbetween the arms-on said sleeve after the locking means on saidhead have been rotated into locked position.

2. In a mixing machine, a shaft having a sleeve, arms depending from said sleeve and spaced apart from each other to form openings, lngs formed yon said arms and projecting inwardly toward said shaft, a head adapted to be coupled to said shaft and having projections thereon adapted to enter the openings formed between the arms and to be rotated into contact with the lugs carried by said arms, means on said sleeve for filling the spaces formed between the arms on said sleeve and maintaining the projections and lugs in locked relationship after the projections have been rotated into contact position.

3. In a mixing machine, a shaft having a sleeve, arms depending from said sleeve and spaced apart from each other to form openings, lugs formed on said arms and projecting inwardly toward said shaft, a head adapted to be coupled to said shaft and having projections thereon adapted to enter the openings 'formed between the arms and to be rotated into contact with the lugs carried by said arms, means slidable on said sleeve and provided with projections for filling the spaces formed between the arms on said sleeve to maintain the head in interlocked position after the projections on said head have been rotated into locked position.

4. In a mixing machine, av shaft having a sleeve, arms `depending from said sleeve and 5 spaced apart from each other to form openings, lngs formed on said arms and projecting inwardly toward said shaft, a head adapted to be coupled to said shaft and having projections thereon `adapted to enter the openings formed between the arms and to be rotated into contact with the lugs carried by said arms, a collar slidable on said sleeve and provided with projections extending into the spaces formed between the arms and adapted to be lowered into filling position after the head and sleeve are in interlocked position.

In testimony whereof I aflix my signature.

WALTER F. DEI-IUFF. 

